A reamer removes any crimp around the primer pocket, but does not change the depth of the primer pocket. Easier primer seating.

A uniformer changes the depth of the primer pocket, but does not remove any crimp. Uniform primer depth, if that is a problem.

If you have a lot of brass to remove crimp, put the reamer into a cordless drill for quicker processing. A small or large primer reamer in a removable handle is probably all that you need. Available on ebay.

the reamer takes out the crimp and the uniformer uniforms the depthI still have and use an older wooden handle uniformer made by lyman although I did buy the K&M primer pocket uniformerbut I usually grab the lyman, it works as good as the K&M but much cheaperIMHO its a good kit, good on you for wanting to get the most out of your reloads

SCJ429 wrote:I use the K&M uniformer to clean out the ash from the primer. I set the depth so that it does not take out any brass shavings.

I don't clean the pockets when loading them, I just cut the pockets on all my brass to consistent depth, deburr the flash hole, and don't touch them again.

The carbon can build up and prevent consistant primer seating, that said as long as your primers are not sitting proud and you are getting the results you want why bother. For me I couldnt sleep at night if I don't do it.